SIC code 36000 classifies businesses engaged in water collection, treatment and supply. There are 1,532 active companies registered under this code in the UK, forming a substantial sector within the national economy. It falls under Section E (Water supply; sewerage, waste management) of the UK SIC 2007 classification system, which is used by Companies House to categorise all registered businesses.
See the full industry analysis on the Water collection, treatment and supply industry page.
With a 89% survival rate, this sector shows strong business longevity. Only 5 of 1,712 companies registered under this code have dissolved, well below the UK average. Companies in this sector average 11.4 years old, reflecting a balanced mix of established businesses and newer market participants. The sector is experiencing strong growth, with 39% of active companies formed since 2020 and 34% during the 2010s. This sustained formation rate points to continued demand for water collection, treatment and supply services. Companies are geographically dispersed across the UK, with no single location dominating. The top three locations — LONDON, MANCHESTER, GLASGOW — together account for just 18% of the sector.
SIC code 36000 stands for "Water collection, treatment and supply" under the UK Standard Industrial Classification (SIC 2007) system. It belongs to Section E — Water supply; sewerage, waste management. Companies use this code when registering with Companies House to indicate their primary business activity. The code is required for annual confirmation statements and is used by HMRC, ONS, and other government bodies for statistical and regulatory purposes.
There are currently 1,532 active companies registered under SIC code 36000 in the UK, out of 1,712 total registrations. This gives a survival rate of 89%, meaning 11% of companies registered under this code have since dissolved. These figures are based on Companies House data and updated regularly.
The top locations for water collection, treatment and supply companies (SIC 36000) are: LONDON (217), MANCHESTER (30), GLASGOW (30), BIRMINGHAM (20), LEEDS (17). Geographic concentration can reflect local economic conditions, industry clusters, or proximity to key markets and supply chains.
The sector is growing: 39% of currently active SIC 36000 companies were formed since 2020, and 34% during the 2010s. This sustained formation rate indicates ongoing demand for water collection, treatment and supply services in the UK.
Companies classified under SIC 36000 have an average age of 11.4 years. This suggests a balanced sector with both established players and newer entrants. Notable companies include CANAL & RIVER TRUST, ANGLIAN WATER SERVICES LIMITED, NORTHUMBRIAN WATER LIMITED.
Related SIC codes within the same division include: 3663 (Other manufacturing not elsewhere classified), 3614 (Manufacture of other furniture), 3612 (Manufacture of other office and shop furniture), 3611 (Manufacture of chairs and seats). Companies may use multiple SIC codes if they operate across several of these related activities. When registering with Companies House, businesses should select the code that best represents their primary activity.
You can search for companies with SIC code 36000 (Water collection, treatment and supply) using UVAGATRON's company explorer, which allows filtering by SIC code, location, and company status. Alternatively, Companies House offers a basic search on their website. Our platform adds risk intelligence, director networks, and signals from 50+ government databases to each company record.
Search, filter, and analyse 1,532 companies classified under this SIC code with AI-powered risk intelligence.
Data sourced from Companies House, HM Land Registry, FCA Register, and 50+ government databases. SIC classification follows the UK Standard Industrial Classification of Economic Activities 2007 (SIC 2007). Last updated: 2026-04-17.